我正在尝试从另一个数组中的数组中获取JSON对象。请参阅下面的JSON：
{
"status": 0,
"message": "successfull",
"resp_body": [
{
"route_id": "4567657tyrthnhrthnyt65y",
"distance": "200km",
"route_duration": "2hrs",
"express": true,
"status": "active",
"route_name": "nairobi-nyeri",
"peak_fare": "250",
"offpeak_fare": "200",
"trips_assigned": [
{
"trip_id": "43tergf",
"date": "2/2/16",
"status": "enroute"
},
{
"trip_id": "45i27563t34",
"date": "12/12/12",
"status": "finished"
},
{
"trip_id": "365ttrg6",
"date": "31/12/17",
"status": "queded"
}
],
"vehicles_ assigned": [
{
"vehicle_id": "nai234",
"date": "12/12/12"
},
{
"vehicle_id": "nai234",
"date": "12/12/12"
},
{
"vehicle_id": "nai234",
"date": "12/12/12"
}
],
"origin": [
{
"town": "nairobi",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"destination": [
{
"town": "nyeri",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"via": [
{
"town": "sagana",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
},
{
"town": "karatina",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
]
},
{
"route_id": "erdbgthrr",
"distance": "230km",
"route_duration": "2hrs",
"express": false,
"route_name": "nairobi-sagana-karatina-nyeri",
"status": "active",
"peak_fare": "250",
"offpeak_fare": "200",
"trips_assigned": [
{
"trip_id": "43tergf",
"date": "2/2/16",
"status": "enroute"
},
{
"trip_id": "45i27563t34",
"date": "12/12/12",
"status": "finished"
},
{
"trip_id": "365ttrg6",
"date": "31/12/17",
"status": "queded"
}
],
"vehicles_ assigned": [
{
"vehicle_id": "nai234",
"date": "12/12/12"
},
{
"vehicle_id": "nai234",
"date": "12/12/12"
},
{
"vehicle_id": "nai234",
"date": "12/12/12"
}
],
"origin": [
{
"town": "nairobi",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"destination": [
{
"town": "nyeri",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"via": [
{
"town": "sagana",
"stage": "tea_room",
"latitude": "12.35454545",
"longitude": "9.68685578",
"arrival_time": "3:14pm"
},
{
"town": "karatina",
"stage": "tea_room",
"latitude": "12.35454545",
"longitude": "9.68685578",
"arrival_time": "3:14pm"
}
]
},
{
"route_id": "rtbgfnhr5t",
"route_name": "nairobi-thika",
"distance": "200km",
"route_duration": "2hrs",
"express": false,
"status": "active",
"peak_fare": "250",
"offpeak_fare": "200",
"trips_assigned": [
{
"trip_id": "43tergf",
"date": "2/2/16",
"status": "enroute"
},
{
"trip_id": "45i27563t34",
"date": "12/12/12",
"status": "finished"
},
{
"trip_id": "365ttrg6",
"date": "31/12/17",
"status": "queded"
}
],
"trip_progress": [
{
"current location": "nyeri",
"latitude": "32.54554654",
"longitude": "-1.4565657",
"average_speed": "67.89 km/h",
"remaining_kms": "0",
"arrival_time": "4.00am",
"trip_duration": "76mins"
}
],
"origin": [
{
"name": "nairobi",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"destination": [
{
"name": "nyeri",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"via": [
{
"name": "karatina",
"latitude": "12.35454545",
"longitude": "9.68685578",
"arrival_time": "3:14pm"
}
]
},
{
"route_id": "rtbgfnhr5t",
"route_name": "nairobi-thika",
"distance": "200km",
"route_duration": "2hrs",
"express": false,
"status": "active",
"peak_fare": "250",
"offpeak_fare": "200",
"trips_assigned": [
{
"trip_id": "43tergf",
"date": "2/2/16",
"status": "enroute"
},
{
"trip_id": "45i27563t34",
"date": "12/12/12",
"status": "finished"
},
{
"trip_id": "365ttrg6",
"date": "31/12/17",
"status": "queded"
}
],
"vehicles_ assigned": [
{
"vehicle_id": "nai234",
"date": "12/12/12"
},
{
"vehicle_id": "nai234",
"date": "12/12/12"
},
{
"vehicle_id": "nai234",
"date": "12/12/12"
}
],
"origin": [
{
"town": "nairobi",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"destination": [
{
"town": "thika",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"via": []
},
{
"departure_time": "2:00 pm",
"e_t_a": "4:00 am",
"express": false,
"status": "finished",
"date": "23/12/18",
"route_name": "nairobi-thika",
"trip_id": "12:00 am",
"vehicle_id": "7HGF68",
"trips_assigned": [
{
"trip_id": "43tergf",
"date": "2/2/16",
"status": "enroute"
},
{
"trip_id": "45i27563t34",
"date": "12/12/12",
"status": "finished"
},
{
"trip_id": "365ttrg6",
"date": "31/12/17",
"status": "queded"
}
],
"trip_progress": [
{
"current location": "nyeri",
"latitude": "32.54554654",
"longitude": "-1.4565657",
"average_speed": "67.89 km/h",
"remaining_kms": "0",
"arrival_time": "4.00am",
"trip_duration": "76mins"
}
],
"origin": [
{
"town": "thika",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"destination": [
{
"town": "thika",
"stage": "tea_room",
"latitude": "32.54554654",
"longitude": "-1.4565657"
}
],
"via": [
{
"town": "thika",
"stage": "tea_room",
"latitude": "12.35454545",
"longitude": "9.68685578",
"arrival_time": "3:14pm"
}
]
}
]}
在上面的JSON主体中，我在
中有一系列路由“resp_body”
在每条路线中，我都有一个
数组“trips_assigned”
我的目标是列出ListView中的路线，并在点击路线时，检索该路线中的所有trip_assigned。我的代码能够做到这一点，但会抛出错误：
索引3超出范围[0..3）W / System.err：at org.json.JSONArray.get（JSONArray.java:293）W / System.err：at org.json.JSONArray.getJSONObject（JSONArray.java:521）
单击列表中的第四个路径时。
我的Java代码：
if ( jsonObject.getInt(getString(R.string.status)) == SUCCESS ) {
respBody = jsonObject.getJSONArray(getString(R.string.resp_body));
ArrayList<HashMap<String, String>> routeList = new ArrayList<HashMap<String, String>>();
for(int i=0; i < respBody.length(); i++) {
HashMap<String, String> temp = new HashMap<String, String>();
temp.put("route_name", respBody.getJSONObject(i).getString(getString(R.string.route_name)));
temp.put("route_distance", respBody.getJSONObject(j).getString(getString(R.string.status)));
temp.put("peak_fare", respBody.getJSONObject(i).getString(getString(R.string.peak_fare)));
temp.put("off_peak_fare", respBody.getJSONObject(i).getString(getString(R.string.offpeak_fare)));
routeList.add(temp);
tripsAssigned = (JSONArray) respBody.getJSONObject(i).get(getString(R.string.trips_assigned));
for(j=0; j < tripsAssigned.length(); j++) {
perResult = respBody.getJSONObject(i);
noRecords.setVisibility(View.GONE);
}
RouteViewAdapter adapter = new RouteViewAdapter(getActivity(), routeList);
if(routeList.size() < 1){
noRecords.setText("No routes to show.");
} else {
listView.setVisibility(View.VISIBLE);
noRecords.setVisibility(View.GONE);
}
listView.setAdapter(adapter);
pd.dismiss();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
try {
String t1 = perResult.getJSONArray(getString(R.string.trips_assigned)).getJSONObject(position).getString(getString(R.string.date));
String t2 = perResult.getJSONArray(getString(R.string.trips_assigned)).getJSONObject(position).getString(getString(R.string.status));
Toast.makeText(getActivity(), t1+t2, Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
pd.dismiss();
}
任何帮助将不胜感激。
答案 0 :(得分：0)
试试这个。我希望这会对你有所帮助
private void parseJson(JSONObject response) throws JSONException {
JSONArray respBodyArray = response.optJSONArray("resp_body");
if (respBodyArray != null){
for (int i=0; i< respBodyArray.length(); i++){
JSONObject arrayObject = (JSONObject) respBodyArray.get(i);
String routeId = arrayObject.getString("route_id");
JSONArray tripsAssignedArray = arrayObject.optJSONArray("trips_assigned");
for (int j=0; j<tripsAssignedArray.length(); j++){
JSONObject tripsAssignedArrayObject = (JSONObject) tripsAssignedArray.get(j);
String tripId = tripsAssignedArrayObject.getString("trip_id");
}
}
}
}